The Disappearance of Lady Edith by Christina McKnight

One tragic night changed sensible, proper Lady Edith Pelton’s life: when her best friend fell to her death, pushed down a flight of stairs by a nefarious lord.  Now, Edith dedicates her time to watching the man she thinks is responsible, while gathering information to expose other scoundrels posing as gentlemen of honor about London. When her spying is noticed by a perfect stranger, Edith finds herself with two mysteries—what happened to her friend, and how to win the heart of this brilliantly handsome lord.

Triston Neville, Viscount Torrington, has been tasked with two duties for the upcoming Season: see that his sisters make the most of their debut, and avoid embroiling himself in another scandal. What he does not expect is the captivating, fair-haired beauty that literally falls into his path. When the mysterious Lady Edith suddenly disappears without a trace, Triston fears his past misdeeds may have returned to destroy his life once more.

Can Triston piece together the puzzle in time to save Edith and prove that his love is nothing less than honorable?